Type-writing machine



(No Model.)

. 1 W. CLARK.

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m: uonms PETERS ca. PHO1D-LITHO.. wAsHmomu o c UNITED STATEs PATENTOFFICE.

W'ILLIAM CLARK, OF NORTH GREENFIELD, WISCONSIN.

TYPE-WRITING MACHINE.

fiPECIFIGATION forming part of Letters Patent No. 496,219, dated April25, 1893.

Application filed November'25, 189lerial No. 413,062. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM CLARK, of North Greenfield, in the county ofMilwaukee and State of Wisconsin, have invented certain new and usefulImprovements in Spacing Devices for Type-Writing Machines; and I dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart' to which it pertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

The main object of my invention is to set and hold the platen inposition to receive the impression of any character out of its usualposition in line with the impression of other characters, andparticularly to utilize the ordinary hyphen for an underscore inmachines which are not provided with a special character for thatpurpose.-

It consists essentially of a dog or movable part applied to the doglever or platen holding device of a typewriting machine in such a manneras to hold the platen in place when turned a fractional interval.

For the purpose of illustration I have shown my device in connectionwith the parts of v a caligraph machine, to which it is particularlyapplicable, although it may be adapted to other machines.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure 1 is an end elevation of the platen and spacing wheel, togetherwith a portion of the carriage and the holdfast dog to which my deviceis applied, it being shown out of' working position. Fig. 2 is a similarview of the parts mentioned, showing the device in working position.Fig. 3 is a reverse View of the holdfast dog and lever in connectionwith my attachment, and Fig. 4 is a plan View of the holdfast dogwithout my attachment.

A represents the platen or impression cylinder, B a portion of thecarriage frame in which the platen is mounted, G the toothed spacingwheel attached to one end of the platen, D the holdfast dog working withthe spacing wheel C to hold the platen at the desired intervals by whichit is turned for spacing the lines.

E is the arm upon which said dog is formed or mounted, pivoted to thecarriage frame B.

e is a spring connecting the arm E with the carriage frame and holdingthe dog D in engagement with the spacing wheel 0.

F is a type bar shown in the operation of producing an impression uponthe platen, in the usual position in Fig. 1, and out of its usualposition in Fig. 2, as the effect of my attachment.

The foregoing parts are of the usual construction employed in machinesof this class, and as they are found in the No. 2 caligraph machine.

My attachment consists essentially of a pawl or movable part G, adaptedto and placed upon one edge of the holdfast dog D, and pivoted to alover or handle H, which is fulcrumed at h to the arm E, or to a blockor plate I attached thereto. This plate I is attached to the inner sideof the dog D by a screw 4 and is formed at one edge with a flange g,which projects over the edge of the pawl G, holding it in place againstthe edge of the holdfast dog D. The three parts, the dog, handle andfulcrum block, constituting my attachment, may be assembled and appliedto machines as they are now constructed without changing any partthereof. It may be more convenient however, to fit and attach the partsconstituting my improvement to the holdfast dog and arm with which it isformed, and to furnish the attachment in connection with said holdfastdog and arm, in applying the device to machines already in use. Inpractice, to underscore with the ordinary hyphen character, or to causeany character to make an impression below its ordinary position in theline, the platen is turned manually in the direction indicated by thearrow from the position shown in Fig. 1 to that shown in Fig. 2, therebylifting the holdfast platen will be returned to its normal position bythe spring 9.

Various changes may be made in the details of construction andarrangement of parts in 5 applying my device to different machines andto accomplish different results within the scope of my invention.

I claim 1. The combination with the platen, spacing wheel and holdfastdog of a typewriting machine, of a part movable into engagement with theback face of a tooth of the spacing wheel when the holdfast dog isbetween the back faces of adjacent teeth of said wheel, to r hold theplaten at a fractional interval of a turn for ordinary spacing,substantially as and for the purposes set forth.

2. The combination with the platen, spacing wheel and holdfast dog of atypewriting machine, of a part movable independently of the spacinglever into and out of range with the teeth of the spacing wheel andconstructed and arranged to abut against the back face of a tooth ofsaid wheel when it is turned so 2 5 as to present a space between theholdfast dog and the back face of the tooth in advance of it,substantially as and for the purposes set forth.

3. The combination with the platen, spacing wheel and holdfast dog of atypewriting machine, of a lever fulcrumed to said dog and a pawl pivotedto said lever and adapted to be moved upon one edge of the dog into thespace between it and the advance tooth of said spacing wheel when theplaten is moved a fractional space, substantially as and for thepurposes set forth.

l. The combination with the holdfast dog and arm of a typewritingmachine, of an attachment for holding the platen at a frac- 4c tionalinterval, comprising a lever fulcrumed to said arm and a pawl pivoted tosaid lever and adapted to be moved thereby along one edge of said dogtoward and from its apex, substantially as and for the purposes setforth.

5. The combination with the platen, toothed spacing wheel andholdfastdog of a typewriting machine, of a part movable on one edge ofsaid dog into and out of range with the teeth of said spacing wheel,substantially as and for the purposes set forth.

6. An attachment for holding the platen of a typewriting machine at afractional interval of the regular spacing for lines, comprising a plateor block attachable to the holdfast dog or arm, a lever fulcrumed tosaid plate or block and a pawl pivoted to said lever and adapted to bemoved thereby upon one edge of the holdfast dog into and out of rangewith the teeth of the spacing wheel, sub- 5c stantially as and for thepurposes set forth.

In testimony that I claim the foregoing as my own I affix mysignature inpresence of two witnesses.

\VILLIAM CLARK.

Witnesses:

Guns. L. Goss, F. C. BUDI).

